import { Component, ViewEncapsulation } from '@angular/core'; @Component({ selector: 'main', templateUrl: './main.component.html', encapsulation: ViewEncapsulation.None, }) export class MainComponent { /** * Constructor */ constructor() {} /** * Track by function for ngFor loops * * @param index * @param item */ trackByFn(index: number, item: any): any { return item.id || index; } }